1.\:\:second\:derivative\:test\:4-x^{2}
2.\:\:second\:derivative\:test\:x^{2}-2x-3
3.\:\:second\:derivative\:test\:x^{3}-3x+1
4.\:\:second\:derivative\:test\:x^{2}-6x+8
5.\:\:second\:derivative\:test\:x^{3}-3x
6.\:\:second\:derivative\:test\:(x+5)^{2}
7.\:\:second\:derivative\:test\:\frac{1}{x^{2}}+\frac{1}{x}
8.\:\:second\:derivative\:test\:\frac{2x^{2}+6}{x}
9.\:\:second\:derivative\:test\:\frac{1}{9+x^{2}}
10.\:\:second\:derivative\:test\:\frac{3}{x^{3}-1}